Cheapest one-way flights from Boston to San Juan in April from 43€

AirHint found the following cheapest one-way flights from Boston (BOS) to San Juan (SJU) in April 2026 (see full year).

One-Way flights

07 Apr Frontier Airlines direct
04 Apr Frontier Airlines direct
22 Apr Spirit Airlines direct
15 Apr Spirit Airlines direct
08 Apr Spirit Airlines direct
20 Apr Spirit Airlines direct
25 Apr Spirit Airlines direct
23 Apr United
09 Apr Frontier Airlines direct
05 Apr jetBlue

Also check the deals for return flights from Boston to San Juan in April.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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